#3 Alistair Overeem
This is a guy who can make you feel defeated before the bout ever starts. Alistair has an outstanding presence, with a very intimidating persona. He was successful in Pride FC, as well as StrikeForce before landing in UFC.
He stands 6'5", weighing 265 pounds. Overeem has a tonne of professional fights to his credit, with an overall professional record of 41 wins, with 15 losses.
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There is also a degree of history between Alistair and Brock as well. The two combatants met in the Octagon in 2011, at the UFC 141 pay-per-view. The result in this contest is something I'm sure Lesnar would like to forget about. The end result of that contest was a big win for Alistair Overeem. He defeated Lesnar in the first round, via TKO.